bob per my recent post. Yes you can represent yourself. No you cannot receive a commission. You can negotiate a lower price and/or credits back from the seller. I may be wrong but would be willing to take a stance that I am correct. Will glady admit to being mistaken if proven so.
I have never seen a principal who is not a licensed agent under the employ of a broker receive a commission in the formal sense that commissions are defined by the DRE.